北极熊英文介绍？北极熊（学名：Ursus maritimus意即"海熊"），又称为白熊或冰熊，是熊属的一个种，是北极地区的典型动物，可能是六十多万年前（也有不同的科学家认为是十五、二十、四十、甚至上百万年前），由灰熊演化出来。那么，北极熊英文介绍？一起来了解一下吧。
Unlike Black and Grizzly bears, which are primarily nocturnal, the Polar Bear may be active at any time of the day or year, searching for prey on long summer days and sometimes on long winter nights. Adaptations to its Arctic habitat include its fur color, which blends with the snowy environment and so provides useful camouflage for capturing prey; its large size, which helps maintain body temperature by reducing surface-heat loss; and its furred feet, which insulate against cold and provide traction on icy surfaces. Because the hairs of its waterproof coat are hollow, they are especially insulating and increase the bear's buoyancy when swimming. An excellent swimmer, it paddles at about 6 1/2 mph (10 km/h) with the front feet only, hindfeet trailing-a trait unique among four-footed land animals-and can remain submerged for about two minutes. While swimming or treading water, it stretches its long neck for a better view, as it does on land. Owing to the scarcity of plants in its icy habitat, the Polar Bear is the most carnivorous North American bear, with canine teeth larger and molariform teeth sharper than those of other bears. An acute sense of smell enables the Polar Bear to locate prey even when it is hidden by snow drifts or ice. It stalks young seals and Walruses, and sometimes adult seals, often by swimming underwater to their ice floes. While hair seals are its staple, it also feeds on fish, birds, bird eggs, small mammals, dead animals (including whales), shellfish, crabs, starfish, and mushrooms, grasses, berries, and algae, when available. The Polar Bear hollows out a winter den in a protected snowbank, where it retires in a lethargic condition. Females den from November to March, during which time they give birth. Males den for much shorter periods, usually from late November to late January, but may be abroad occasionally at any time of the year. Cubs remain with their mother about a year and a half, denning with her the winter after their birth. The lowlands of Hudson Bay and James Bay, one of the world's largest denning areas for Polar Bears, is the only known region where Polar Bears den in earth rather than in snow. They excavate caves in lake and stream banks and peat hummocks by digging down to the permafrost. This area is unusually far south for the species, and it is believed that they use the permafrost dens again in summer to cool off. No large denning areas have yet been found in Alaska; some Polar Bears in that region may winter in Siberia, drifting across to Alaska on ice floes in spring. Polar Bears are a source of food and hides for Native Americans.答案补充 英文好自己从中间找到答案!
The polar bear is a magnificent animal that inhabits the Arctic region. As the largest land predator on Earth, it is a symbol of strength and resilience in the face of harsh environments.
Polar bears have a distinctive white fur that helps them blend in with the snowy landscapes of the Arctic. Their fur is not actually white, but transparent and hollow, which reflects light and gives them their characteristic appearance. Underneath their thick fur, they have a layer of fat that can be up to 11 centimeters thick, which helps keep them warm in the frigid temperatures of the Arctic.
Polar bears are excellent swimmers and can swim for long distances in search of food. They feed mainly on seals, which they hunt by waiting patiently at breathing holes in the ice or by swimming under the ice to catch them by surprise. Polar bears are also known to scavenge on carcasses of whales and other marine mammals.
Climate change is one of the biggest threats facing polar bears today. As the Arctic ice melts due to rising temperatures, polar bears are finding it increasingly difficult to find food and are having to travel longer distances to find it. This is putting a strain on their already vulnerable populations, and many scientists fear that polar bears could become extinct within the next few decades if urgent action is not taken to mitigate the effects of climate change.
In conclusion, the polar bear is a fascinating and majestic animal that embodies the resilience and adaptability of nature in the face of adversity. We must do everything we can to protect these incredible creatures and the fragile ecosystems in which they live.
中文翻译
北极熊是一种生活在北极地区的壮丽动物。
学 名：Polar bear种 属：Bear Family身 高：1.9-2.8 meters体 重：150-800 kilos居住地：the Arctic （北极）食 _：fish ， seals （海豹） ， walruses（海象）， whales（白鲸） ...特 长：swim ， dive （潜水）Polar bear is the largest carnivore on land.Climate change has been damaging polar bears' sea ice habitats and scavenge for food on land.来源：阅读（快乐英语中年级）
The polar bear is a bear native to the Arctic. Polar bears and Kodiak bears are the world's largest land carnivores, with most adult males weighing 300-600 kg ; adult females are about half the size of males. Its fur is hollow and translucent, but usually appears as white or cream colored, thus providing the animal with effective camouflage. Its skin is actually black in color. Its thick blubber and fur insulate it against the cold. The bear has a short tail and small ears that help reduce heat loss, as well as a relatively small head and long, tapered body to streamline it for swimming.
A semi-aquatic marine mammal, the polar bear has adapted for life on a combination of land, sea, and ice, and is the apex predator within its range. It feeds mainly on seals, young walruses, and whales, although it will eat anything it can kill. It is the bear species most likely to prey on humans.
The polar bear is a vulnerable species at high risk of extinction. Scientists and climatologists believe that the projected decreases in the polar sea ice due to global warming will reduce their population by two thirds by mid-century. Local long-term studies show that 7 out of 19 subpopulations are declining or already severely reduced. In the USA, the Center for Biological Diversity petitioned to up-list the legal conservation status of polar bears to threatened species in 2005. This petition is still under review.
北极熊又称白熊，是在北极里生长的熊，它是陆上最庞大的肉食动物。在它生存的空间里，它是食物链最顶层。它拥有极厚的脂肪及毛发来保暖，其白色的外表在雪白的雪地上是良好的保护色，而且它可以在陆上及海上捕捉食物，因此它能在北极这种极严酷的气候里生存.
Polar bears, is also called arctic bear in the arctic grows, it is the largest predator on land. In its existent space, it is the topmost food chain. It has thick fat and hair to stay warm, its white appearance on white snow is good protective coloration, and it can on land and sea, so it can catch food in the arctic this extremely harsh climate survive.
以上就是北极熊英文介绍的全部内容，学 名：Polar bear 种 属：Bear Family 身 高：1.9-2.8 meters 体 重：150-800 kilos 居住地：the Arctic （北极）食 _：fish ， seals （海豹） ， walruses （海象）， whales（白鲸） 特 长：swim ，内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
